Category: Tutorial

Plasma surface activation is a widely used technology in materials science and engineering, and its main role is to change the material surface properties through plasma treatment, so as to improve its adhesion, wettability, wear resistance and corrosion resistance. With the help of plasma surface treatment before spraying: remove various impurities (such as oil stains, rust, floating ash, old paint layer, etc.) adhered to the surface of the object, and give excellent substrates suitable for spraying standards to ensure that the coating has excellent corrosion resistance, decorative performance and some special effects. Thus plasma treatment on the object surface is crucial for high end spray painting. Plasma Activation Principle The plasma used in the process is a positively charged gas that contains many particles such as electrons, ions, free radicals,…

Dust-free clean room, also known as clean workshop or clean room is a specially designed room that excludes particles from the air within a certain space range, harmful air, bacteria and other pollutants, and controls the indoor temperature, cleanliness, indoor pressure, air velocity and air flow distribution, illumination and static electricity within a certain range of requirements. No matter how the room out air conditions change, the interior can maintain the characteristics of cleanliness, temperature, humidity and pressure as per setting. Clean room is a crucial part for paint shop construction. The classification of dust-free workshop is mainly divided according to the number of dust particles in workshop atmosphere. According to the international standard ISO 14644-1, clean rooms can be divided into the following classes: ISO Class 1: No more…

For metal and especially heavy metal parts coating like truck/automotive components, shot blasting and sandblasting are two popular solutions for surface cleaning treatment, but they have differences in working principle, application, and final results are also different. In this article post we will introduce and compare the two from the most concerned points and help select the appropriate solution in actual practice. Working Principles Shot blasting is processed by a high-speed shot blasting agent (such as steel grit, aluminum sand, etc.) onto the workpiece surface under the action of compressed air or mechanical force, use the force impact and friction of shot blasting agent to remove dirt, oxide layer or old coating, while improving the surface quality. Sandblasting makes use of compressed air as the power to form a high-speed…

The use of industrial robots in manufacturing industry is increasing, especially in harsh conditions or with high work intensity and sustainability requirements. Plus the low rate failure, makes robots widely recognized. However, even the design of industrial robot is standardized, integration is quite high and the failure rate is low, routine inspections and preventive maintenance must still be carried out regularly. Common robots like: tandem articulated robots, Cartesian coordinate robots, Delta parallel robots, scara robots, automatic guided trolleys, etc., the maintenance in this article is mainly for articulated robots. Maintenance of industrial robot body General maintenance 1) Clean the manipulator Regularly clean the base and arm of the manipulator; High-pressure cleaning equipment can be used, but direct injection into the robot should be avoided; If the manipulator is protected by…

Electrophoresis coating(E-coating) is a popular surface treatment technology which is widely used for iron, steel, alloy alluminum and almost all hardware production. However, it's not an easy work to have the process well going as it requires professional technologies and personal experience over the various equipments. In this article we will briefly introduce the process control of electrophoresis coating. Electrophoretic coating process The basic procedures of electrophoresis coating including: Loading → ultrasonic degreasing → water rinsing → pure water rinsing → pure water rinsing → electrophoretic coating → pure water rinsing → pure water rinsing → pure water washing → drying → unloading. Key points for process control in each stage 1. After the workpiece is formed and before loading to coating system, the surface should be wired or chemically…

The automotive coating process belongs to decorative and protective multi-layer coating, which includes the most processes and the highest coating quality requirements for automotive finishing. General coating process system According to the layer of coating, commonly used coating process system include: Two coating systems (primer + topcoat); Three-coating system (primer + middle coat + topcoat or metallic glitter paint/varnish); Four-coating system (primer + middle coat + topcoat + varnish, suitable for luxury cars with higher coating requirements). Generally, the mostly used is the three-coating system, it's widely used for the body of the car, bus and the cab of the truck with high decorative requirements. According to the drying conditions, its available as drying system and self-drying system. The drying system is suitable for automobile coating produced by mass assembly…

In surface finishing industry, sometimes we need to give metallic treatment for different materials. Normally we use vacuum metallization or electro plating directly, but if we need to apply a specific design to surface, these solutions are not perfect and we need to source another way called "gold stamping". Gold stamping overview Gold stamping or sometimes known as hot stamping. The process uses the principle of hot pressure transfer to transfer the anodized aluminum layer onto substrate surface to form a special metallic effect. Becase the main material used for stamping is anodized aluminum foil, gold stamping is also called anodized aluminum hot stamping. The most commonly used in printing industry is to hot stamp electrochemical aluminum foil on paper, which is called gold stamping. It is a general term…

Painting robot is an industrial robot that can carry out automatic painting or spraying other coatings, mainly composed by robot body, a computer and the control system, hydraulic painting robot also includes a hydraulic oil source, such as an oil pump, an oil tank and a motor. Mostly using 5 or 6 degrees of freedom structure, the arm has a large space for movement, and can do complex trajectory movements, its wrist generally has 2~3 degrees of freedom, can move flexibly. So, what are the terms for painting robots and its key parameters? Painting robot main terms Painting robot motion efficiency, coating efficiency and application efficiency Motion efficiency refers to the efficiency of coating operations, including the effective utilization rate of spraying area, coating and spraying area per unit time.…

Overview of coatings Coatings are complex chemical mixtures. Generally speaking, coatings are mainly composed of primary, secondary and auxiliary film-forming substances. The main film-forming material is an indispensable part of the coating, which plays a leading role in the performance characteristics of the coating layer. Secondary film-forming substances refer to various pigments, fillers, which cannot be filmed alone, but are important components that make up the layer and affect their properties. Anancillary film formers include solvents and many other additives that improve the properties of coatings and coatings. Classification of paints According to the state of the coating: powder coating and liquid coating; According to gloss: glossy paint, flat paint and matte paint; According to the drying method: self-drying paint, baking paint, infrared drying paint and ultraviolet drying paint (i.e.,…

For UV coating application, it's crucial to understand how much UV energy required in order to have it properly cured. Only after we confirmed the amount of energy we can then determine how many UV lamps to install with specific power. In order to properly configure the UV oven, there's a variety of properties we need to take into consideration during our calculation. Following we will introduce a formula for quick calculation. Points to consideration For accurate calculation we need to understand the following - type of product for painting, line speed and the time to stay under uv light. Type of product - Different products require different uv coating to work with. For example the uv coating for plastic and metal parts have different components and required uv radiation…